HEBENSTRETIA 
407 
in Myrtiflorae, whilst Benth. -Hooker add to it the Callitrichaceae and 
place it in Rosales. 
Halorageae (Benth. -Hooker) = Haloragidaceae. 
Haloragis Forst. Haloragidaceae. 50 sp. Austr., N. Z., Tasm., S.E. 
As., N. Am. Large herbs living in damp places. Firs. 4-merous 
throughout, obdiplostemonous. 
Haloxylon Bunge. Chenopodiaceae (10). 10 sp. N. temp, and sub-trop. 
Steppe plants of curious habit (fig. in Nat . PJi .). 
Eamamelidaceae. Dicotyledons (Archichl. Rosales). 18 gen. with 
50 sp. chiefly sub-trop. (N. and S.). The distribution areas of the 
genera (q.v.) are extremely disjointed, a fact probably due to the 
influence of the glacial period (p. 146 and Nat. PJI.). They are 
closely allied to Cunoniaceae, and hence to Saxifragaceae. Trees 
and shrubs with alt., simple or palmate, stip. leaves. Infl. racemose, 
often a spike or head, frequently with an involucre of coloured bracts. 
Fir. $ or unisexual, often apetalous, rarely naked, hypo- peri- or epi- 
gynous, usually without a disc. K 4 — 5, usually imbricate; C 4 — 5, 
open or valvate, the petals often long and rolled up like a watch- 
spring in bud ; A 4 — 5 or rarely fewer ; G (2), usually median, rarely 
obliquely placed, with 2 styles, 2-loc. ; ovules 1 or more in each loc., 
pendulous, anatropous, with ventral or lateral raphe. Loculicidal or 
septicidal capsule. Exocarp woody, endocarp horny. Seed albu- 
minous, with straight embryo. Some sp. yield useful wood, resins, 
&c. Chief genera: Bucklandia, Liquidambar, Altingia, Fothergilla, 
Hamamelis. [Placed in Saxifraginae by Warming, in Rosales by 
Benth.- Hooker.] 
Hamamelideae (Benth.- Hooker) = Hamamelidaceae. 
Hamamelis Gronov. ex Linn. Hamamelidaceae. 3 sp., two in China 
and Japan, the other, H. virginiana L., the witch-hazel, in east N. 
Am. This sp. is common in gardens. It flowers in late autumn and 
ripens its fruit (which is said to be explosive) in the following year. 
Hanburia Seem. Cucurbitaceae (iv). 1 sp. Mexico. Fruit ex- 
plosive. 
Haplopappus Endl. = Aplopappus Cass. 
Hardenbergia Benth. Leguminosae (in. 10). 3 sp. Austr. Included 
in Kennedya in Nat. PJi. 
Harpagopbytum DC. Pedaliaceae. 3 sp. S. Afr. H.procumbens DC. 
is the grapple-plant ; its fruit is beset wdth large woody grapples 
about an inch long, pointed and barbed. It is thus well adapted to 
animal distribution, and is troublesome to w^ool growers (cf. Xan- 
thium). 
Hartwegia Lindl. Orchidaceae (13). 2 sp. Cent. Am. 
Hauya (Moc. et Sesse) ex DC. Onagraceae (ill) . 4 sp. Mexico, Calif. 
Hawortbia Duval. Liliaceae (ill). 100 sp. S. Afr. Xerophytes with 
fleshy leaves, similar in habit to Crassulaceae. 
Hebenstretia Linn. Scrophulariaceae (11. 9). 20 sp. S. Afr. The 
